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Walker 350-34289 Oxygen Sensor - Downstream
| Brand | Walker 350-34289 |
|---|---|
| Position | Downstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 38.11 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 34.57 |
| Product line | Walker Products Aftermarket |
| Fits | Saturn · 3 vehicles |
OE replacement. Engineered as a direct-fit sensor for reliable ECU feedback.
Heated sensor. Helps the system reach operating temperature faster for consistent readings.
Threaded mount. Installs with a secure threaded connection.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 350-34289 Oxygen Sensor for Saturn Ion
Walker Products 350-34289 is a heated oxygen sensor built as a specific-fit replacement for the downstream position on select Saturn Ion models. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.
Key Features
- Heated oxygen sensor for faster operating response
- Specific fitment for the downstream bank 1 sensor 2 location
- 4-wire design with a male radiused polygon connector
- Threaded mounting style with 18.0 mm thread diameter
- Wiring harness length: 34.57 in.; overall length: 38.11 in.
- Wire gauge: 20
Product Details
Walker Products Aftermarket focuses on OE-style engine management and oxygen/air-fuel sensors for precise application matching. Part number 350-34289 is built for the 2003-2004 Saturn Ion downstream sensor position, where accurate exhaust-gas feedback helps the engine control module monitor catalyst performance and fuel mixture behavior. If the original sensor is worn or damaged, the vehicle may store fault codes and show drivability or emissions-related symptoms. This Walker 350-34289 oxygen sensor is a direct-fit option for the specified Saturn Ion application.
This part cross-references no listed interchange numbers for the same application.
Common Issues This Sensor May Address
- Check engine light related to downstream oxygen sensor performance
- Stored ECU fault codes tied to exhaust feedback readings
- Rough engine operation caused by inaccurate sensor data
- Increased fuel consumption from poor air-fuel correction
- Higher exhaust emissions from a failing oxygen sensor
Installation Notes and Tips
Fits 2003-2004 Saturn Ion, downstream bank 1 sensor 2. Confirm connector shape, thread diameter, and harness routing before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion, since physical damage can shorten service life and affect signal quality.
Quality Assurance
Walker Products has manufactured engine management components since 1946 and operates under Automotive ISO 9001/TS 16949 certification. The 350-34289 is produced as a specific-application replacement to match the required fitment position and ECU feedback needs for the listed Saturn Ion models.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2004 | Saturn | Ion | 2.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2004 | Saturn | Ion | 2.0L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
| 2003 | Saturn | Ion | 2.2L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket |
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